Safety appliance for gas burners



Nov. 11 1924. 1,514,899

A. J. GILDEN SAFETY APPLIANCE FOR GAS BURNERS Filed May 4. 1923 We ff/ Alfalfa, Jden.

INVENTOR.

a" wn'NEss: ArroRNEY.

Patented Nov. ll, 1924.

ma J. Grimm, or nnooxrms, NEW vonk.

SAFETY runnen non. ons Bunms.

. Application med my 4,. serial no. 636,654.

To all whom t mafy concern.'

Be it known that'I, ABRAHAM J. GIL'DEN,

ya citizen of -the United States, residin at Brooklyn, in the county of Kings and tate of New York, have invented new and useful Improvements in Safety Appliances for Gas Burners, of which the following is a specication.

Thisinvention relates to automatic gas cut-offs for use in connection with the burner of a gas stove or the like, and is an improvement over the application filed by me on Aug. -3, 1920, Sr. No. 400,957, allowed Jan. 23, 19v

The principal object of the invention is'V to burners or the like, whereby the accidental extinguishing of the iiame will cause a valve to operate, to close the escape of gas from the main su ply pipe to the burner.

Another o ject of the invention is the provision of a device of the class mentioned having a thermostatic rod disposed above the burner of the gas stove, and manually operated to hold a valve in open position, and a friction device engageable with said rod to permit of the expansion of the rod in one direction and to securely grip the rod to permit contraction in the oppo-site direction.

A still further object of the invention is to provide an automatic gas cut-off which is simple in construction, cheap of manufacture and positive in operation.

With these and other objects in view the invention resides in certain novel construction, combination and arrangement of parts, the essential features of which are hereinafter fully described in the specification, are pointed out inthe appended claims, and illustrated in the accompanying drawing, in which:

Figure 1 is a vertical sectional View through a gas burner showing my invention applied thereto and showing the position of the parts when the gas is extinguished.

Fi re 2 is a similar view but showing the position of the parts when the gas is lighted.

Figure 3 is a detail sectional view on the line 3 3 of Figure 2.

Figure 4 is a detail perspective view of the friction device.

It so happens that the'iiow of a gas burner ofttimes becomes accidentally extinguished either by low pressure or by a st of wind, thereby liooding the room wit deadly gas provide an automatic cut-oli' for gas fumes, which in a great man prove fatal to the occupants. am aware that various devices to prevent such accidents have been placed on the market but have never proven satisfactory for the reason of their numerous parts and their bulky appearance. It is therefore my intention to provided a cut-oE-fwhichis extremely simple in construction and operation, and positive in its action, all possibilities of inoperativeness being eliminated.

Like characters of reference refer to like parts in the several views of the drawing.

Referring more particularly to the drawing, the reference numeral 10 designates a gas manifold adapted to. supply gas to a' burner 11 above which 1s positioned the usual grid 12. It will be seen that my invention is shown as applied to the burner of a gas stove, but it is obvious that the same could be used in connection with a gas jet, gas heater or other similar appliances.

Interposed between the manifold 10 and the burner 11 is a valve structure 13,l comprising a cylindrical casin 14 closed at one end as at 15, and provid with nipples 16 for communication with the manifold v10 and pipe 17 leading to the burner. The nipples 16 are provided with aligned bores 18 opening into the cylindrical casing 14, and toward the top of the casing and facing in a direction of the burner is an aperture 19.

Slidable in the casing 14 is a plunger rod 2() provided at its'top with a manipulating head 21. The rod 2O is provided 'along the length thereof with reduced portions 2,2 and 23 respectively, the portion 22 adapted to be brought into registration with the bores 18 of the nipples 16 when the rod is depressed to permit the free passage of gas from the manifold to the burner. A spring 22 -is interposed between the lower end of the rod 20 and the bottom 15 of the casing, and constantly tends to force the rod upward to close the bores 18. Extending downwardly from the head 21, and parallel with the cylinder is a member 24 provided with a slot 25 for receiving one end of a thermostatic rod 26, this particular end of the rod terminating within the aperture 19 of the casing 14. The member 24 acts asa low the grill 12 so as to be heated when the burner is lighted. The other end of the rod 26 is rovided with a manipulatin knob 27, and)secured to the underside of t e gr1 ll 12 is a friction device 28. The device is spllt as at 29, to provide clamping jaws 30,l between which the rod 26 is gripped. A screw 31 is shown for varying the amount of friction between the jaws andthe thermostatic rod.

In operation, we shall presume that the parts are in the position as shown in Figure 1, and it is desired to light the burner 11. The head 21 of the rod 24 is depressed to bring the reduced portions 22 and 23 into registration `with the bores 18 and aperture 19 respectively. The thermostatic rod 26 is rasped at the knob 27 and the same pushed orward to brin the rod into co-actin engagement with t e shoulder of there uced portion 23, so as to hold the valve in its open position. The burner is now lighted and the heat from the same will cause the thermostatic rod to expand, and by reason of the front end of the same engaging the rod 20,

the -same will be compelled to expand rear# of anchoring the same sotliat the movement of the rod upon contraction will be in a rearward direction, thereby withdrawing the rod from engagement with the rod 20 and permitting the spring 22 to return the valve to its closed position as shown in Figure 1 for shutting oil' the flow of gas. However, should it be desired to..purposely extinguish the low, the thermostatic rod 26 is manually withdrawn at the knob 27.

While vthere has been shown and described what I consider to be the preferred form of my invention, it is to be understood that I do not wish to limit myself to the precise structural details herein exhibited, but that changes, alterations, and modifications, as come within the claims may be resorted to when desired.

What is claimed as new is:

l. A thermally controlled device for valves comprising a valve structure having a movable plug and intake and outlet connect-ions respectively, controlled by movement of the plug of the valve, and a thermal rod co-acting with the plugA of the valve andl adapted to be moved into locking engagement with the plug of the valve, said rod adapted to be subject to the action of a flame to permit the rod to be contracted a flame to permit the rod to be contracted when the flow is extinguished, and means for normally setting up a frictionally binding action against the rod while permitting' the latter to be moved manually, and means to cause the plug of the valve to close said inlet and outlet connect-ions automatically on contraction of the rod.

3. A thermally controlled device for valves comprising a valve structure having a movable plug and intake and outlet connections respectively, controlled b movement of the plug of the valve,4 an a thermal rod co-acting with the plug of the valve and adapted to be moved into locking engagement with the .plug of the valve, said rod adapted to be subject to theaction of a flame to permit the rod to be contracted.'

when the flow is extinguished, and means for normally setting up a frictionally binding action against the rod while permitting the latter to be moved manually, said fric` tionally binding means comprising relatively adjustable parts in circumferential relation to the rod.

' 4. A thermally controlled device for use in connection with valve structures comprising thermally actuated means adapted for adjustment against the plug of the valve to secure the latter in oneposition of adjustmeut, and means for inducing a binding ac.-

tion against the thermally actuated means to permit the same to be moved bodily with relation to the valve and to be secured at ing a rod capable of expansion and contraction respectively, and means for frictionally embracing the rod and adapted to permit the sliding movement'thereof, in combination with a valve-casing freely receiving one end of said rod and a plug movable in the casing and adapted to co-act with said end.

embracing the -rod and vadapted to permit the sliding movement thereof, in combination with a valve-casing freely receiving one end of said rod and a plug movable in the casing and adapted to co-act with said end, the casing having inlet and outlet connections, respectively, and means to automatically move the plug to close said connections on contraction of said rod.

. 8. A thermally actuated device for use in connection with valve structures comprising thermally actuated means, means for creating frictionally binding action against said i thermally actuated means, means for regulating the pressure ofI said frictionally bind- A ing action against therst said means.

9. A thermally actuated device for use in connection with the valve of a gas burner comprising a burner frame, a thermally ac` vtuated rod operatively connected with the `valve structure to respectively lock the plug thereof inone position of adjustment on movement of the rod in one direction and to free the plug on movement of the rod in the :other direction, and adjustahle means on the frame yofthe burner in frictional en gagement with said rod.

In testimony whereof I have affixed my signature.

ABRAHAM J. GILDEN. 

